Add build scripts. Add CircleCI config. Add maven settings for ossrh …

…server.

.circleci/config.yml

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+version: 2
+jobs:
+  build:
+    # directory where steps will run
+    working_directory: ~/commons-lang
+    docker:
+      - image: daniloarcidiacono/ci-java-node:0.4.0
+
+    steps:
+      # check out source code to working directory
+      - checkout
+
+      # restore the saved cache after the first run or if `pom.xml` has changed
+      - restore_cache:
+          key: commons-lang-{{ checksum "pom.xml" }}
+
+      # gets the project dependencies
+      - run: mvn dependency:go-offline
+
+      # saves the project dependencies
+      - save_cache:
+          paths:
+            - ~/.m2
+          key: commons-lang-{{ checksum "pom.xml" }}
+
+      # Build
+      - run: mvn clean package verify -Pdocs
+
+      # Deploy
+      - deploy:
+          name: "Create GitHub release"
+          command: |
+            hub release create -a target/commons-lang-$CIRCLE_TAG-javadoc.jar -F CHANGELOG_LATEST.md $CIRCLE_TAG
+
+      # uploads the test metadata from the `target/surefire-reports` directory so that it can show up in the CircleCI dashboard.
+      - store_test_results:
+          path: target/surefire-reports
+
+      # store the jar as an artifact
+      - store_artifacts:
+          path: target/commons-lang-{{ .Environment.CIRCLE_TAG }}.jar
+
+workflows:
+  version: 2
+  build_and_deploy:
+    jobs:
+      - build:
+          filters:
+            tags:
+              only: /.*/
+            branches:
+              ignore: /.*/
+
+

.mvn/settings.xml

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+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                  https://maven.apache.org/xsd/settings-1.0.0.xsd">
+    <servers>
+        <server>
+            <id>ossrh</id>
+            <username>${ossrh.username}</username>
+            <password>${ossrh.password}</password>
+        </server>
+    </servers>
+</settings>

scripts/prepare-release.sh

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+#!/usr/bin/env bash
+
+# Check that we are in the root folder
+if ! [[ -f "./scripts/prepare-release.sh" ]]; then
+    (>&2 echo "Script must be run from the root folder, actual $(pwd)")
+    exit 1
+fi
+
+# Get the current branch
+branch_name=$(git symbolic-ref -q HEAD)
+branch_name=${branch_name##refs/heads/}
+branch_name=${branch_name:-HEAD}
+
+# Check that we are in master
+if [[ ${branch_name} != 'master' ]]; then
+    (>&2 echo "Releases can be prepared only on master branch, current one is ${branch_name}!")
+    exit 1
+fi
+
+# Check the arguments
+if [[ "$#" -ne 1 ]]; then
+    (>&2 echo "Invalid number of arguments, found $#, expected 1")
+    echo "prepare-release <new-version>"
+    exit 1
+fi
+
+# Fetch (for picking tags)
+git fetch
+existing_tag=$(git tag --list | grep $1 | wc -l)
+if [[ ${existing_tag} -gt 0 ]]; then
+    (>&2 echo "Tag $1 already exists, stop.")
+    exit 1
+fi
+
+# Merge
+echo "Merging from dev"
+git merge origin/dev --no-ff --no-commit
+
+# Check if there are any conflicts
+conflicts=$(git ls-files -u | wc -l)
+if [[ ${conflicts} -gt 0 ]]; then
+   (>&2 echo "There are merge conflicts, stop (use git merge --abort to undo changes).")
+   exit 1
+fi
+
+# Update the version
+echo "Setting project version to $1"
+mvn versions:set -DgenerateBackupPoms=false -DnewVersion=$1
+
+# Compile with tests
+mvn clean verify
+
+if [[ $? -ne 0 ]]; then
+    (>&2 echo "Project build failed, stop (use git merge --abort to undo changes).")
+    exit 1
+fi
+
+# Success: commit and tag
+echo "Build success, creating tagged commit"
+git commit -am "chore: version $1"
+git tag -a $1 -m "$1"
+
+# Ready to push!
+# git push origin master --tags

scripts/start-next-iteration.sh

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+#!/usr/bin/env bash
+
+# Check that we are in the root folder
+if ! [[ -f "./scripts/start-next-iteration.sh" ]]; then
+    (>&2 echo "Script must be run from the root folder, actual $(pwd)")
+    exit 1
+fi
+
+# Get the current branch
+branch_name=$(git symbolic-ref -q HEAD)
+branch_name=${branch_name##refs/heads/}
+branch_name=${branch_name:-HEAD}
+
+# Check that we are in dev
+if [[ ${branch_name} != 'dev' ]]; then
+    (>&2 echo "Next iterations can be started only on dev branch, current one is ${branch_name}!")
+    exit 1
+fi
+
+# Check the arguments
+if [[ "$#" -ne 1 ]]; then
+    (>&2 echo "Invalid number of arguments, found $#, expected 1")
+    echo "start-next-iteration <new-version>"
+    exit 1
+fi
+
+# Check that the working tree is clean
+if [[ -n $(git status -s) ]]; then
+    (>&2 echo "Working tree is not clean, stop")
+    exit 1
+fi
+
+# Update
+git fetch
+
+# Try to fast forward the dev branch
+git merge origin/dev --ff-only
+
+# Check for no conflicts
+if [[ $? -ne 0 ]]; then
+    (>&2 echo "There are remote changes in dev branch that could not be merged automatically, stop.")
+    exit 1
+fi
+
+# Change the version
+echo "Setting project version to $1"
+mvn versions:set -DgenerateBackupPoms=false -DnewVersion=$1
+
+# Success: commit
+echo "Success, creating commit"
+git commit -am "chore: start next development iteration ($1)"
+
+# Ready to push!
+#git push origin dev